Drawing frame for a spinning machine



Nov. 5, 1957 R. NEBlcH DRAWING FRAME FOR A SPINNING MACHINE Filed April14, 1955 2 Sheets-Sheet 1 PUD; NEB/CH Nov. 5, 1957 R. NEBlcH 2,811,751

DRAWING FRAME FOR A SPINNING MACHINE Filed April 14, 1955 2Sheets-$11991*I 2 INVENTOR UD/ NEB/CH 2,811,751 DRAWING FRAME FOR ASPINNING MACHINE Rudi Nebicll, Karl-Marx-Stadt, Germany, assigner to VEBSpinnereimaschnenbau Karl-Marx-Stadt, Karl- Marx-Stadt, GermanyApplication April 14, 1955, Serial No. 501,317 9 Claims. (Cl. 19135)This invention relates to spinning machines, and more particularly to adevice for subjecting the top rollers of a drawing frame to a load.A

An object of the invention is to provide a drawing frame, wherein thedistances between its rollers may be varied and wherein the load actingon the adjustable top rollers remains the same at all times, regardlessof the distances as they may be adjusted between said adjustable toprollers. j

Another object of the invention is to provide a drawing frame withadjustable rollers, wherein, irrespective of the position of theadjusted top rollers, said top rollers may be subjected at all times tothe same load without necessitating a change in the position of theweighting means causing the load.

Another object of the invention is to improve on the construction ofdrawing frames as now customarily made.

Other objects and structural details of the invention will be apparentfrom the following description when read in conjunction with theaccompanying drawings forming part of this specification, wherein: f

Fig. 1 is a side elevational view, partly in section, of a supportcarrying the top rollers of a drawing frame according to the invention,

Fig. 2 is a side elevational view of the'support shown in Fig. 1,wherein, however, the upper portion thereof is in opened position,

Fig. 3 is a fragmentary top plan view of the lower portion of anotherembodiment of a support according to the invention, and

Fig. 4 is a vertical sectional View of a different embodiment of aweighting means arrangement of the device according to the invention.

Referring now to Figs. l and 2, 30 generally indicates a support for thetop rollers 1, 2, 3 of a Adrawing frame.

Said support 30 comprises an upper portion 11 swing-k ably mounted on alower portion 12 at 13. The top rollers 1, 2, 3 are carried by holders4, 4, 4 respectively. The position of the feed top roller 3 is xed, butthe other two top rollers may be adjusted in the direction of drawing.For this purpose, the holders 4 and 4" of said top rollers 1 and 2 aremounted on double-armed levers 5, 6 and 5', 6' respectively which areprovided with the bearing journals 7 and 7 respectively. Compressionsprings 8, S respectively act from above onto the front arms 5,respectively of said double-armed levers, while compression springs 9, 9respectively act from below onto the rear arms 6, 6"respec`tively ofsaid double-armed levers. Said compression springs 8, 8', 9 and 9 areimmovably arranged, whereas the double-armed levers 5, 6 and 5', 6 maybe displaced in the direction of the drawing operation. To that end, the`support 30 is provided with series of notches 10 and 10 respectively.According to the embodiment shown in Figs. l and 2, each series ofnotches 10, 10 has seven notches for nited States Patent selectiveengagement with the journals or pins 7, 7 of the double-armed levers 5,6 and 5, 6. The pin 7 of the double-armed lever 5, 6 carrying thedelivery top roller 1 is placed in the center notch of the series ofnotches 10. Therefore, the distance x of the axis of the spring S fromthe axis of the journal 7 of the doublearmed lever 5, 6 is exactly thesame as the distance y between the axis of the spring 9 and said journal7. According to the arrangement shown in Figs. 1 and 2, however, pin 7of the double-armed lever 5, 6 carrying the center top roller 2 isengaged with the third notch from the front of the series of notches10', so that the distance x' between the spring 8 and the pin 7 issmaller than the distance y between the spring 9' and the pin 7. Thus,when the .pin 7 of the double-armed lever 5, 6 is displaced from acenter position (as shown for pin 7 of the double-armed lever 5, 6) intothe olf-center position shown in Figs. l and 2, the spring S is broughtnearer to the axis of the pin 7 by one division of the series of notches10', while, at the same time7 the spring 9 has been removed from theaxis of the pin 7 by the same division, it being understood that onlythe double-armed lever S', 6 has been displaced while the springs 8 and9 remain in their position relative to the casing of the support 30.Thus, the spring 8 will exert a smaller pressure on the top roller 2than the corresponding spring S on top roller 1. On the other hand,however, the pressure of spring 9 on the top roller 2 is proportionatelygreater than the pressure exerted by the spring 8 on the top roller 1.

It will be readily understood from above that the load acting on the toprollers 1 and 2 at all times has the same value, irrespective of theposition of said adjustable top rollers 1 and 2, and that this effect isobtained without a displacement of the weighting means 8, 8, 9 and 9'.Each weighting station has two stationary weighting means 8, 9 and 8', 9respectively which, while being in complementary relation to each other,cooperate in such a manner with each other, that they exert the sametotal pressure on the associated top roller, irrespective of theposition of the latter. At each weighting station the twosprings 8 and 9or 8 and 9 respectively act in the same direction of rotation on the twoarms of the double-armed lever 5, 6 or 5, respectively; said two springsactingon the two arms of the double-armed lever in opposite directionsremain in their position while the pivot 7 or 7 respectively of theassociated double-armed lever may be displaced in the direction of thedrawing, so that upon a displacement of the pivot 7 or 7 the latter isbrought nearer to one of the springs or weighting means to the sameextent as it has been removed from the other spring or weighting means.

Preferably the support 30 is constructed in the form of a hollow body,the two double-armed levers 5, 6 and 5, 7 being accommodated therein.The upper portion 11.

of said support 39 carries the springs 8 and 8 acting on thedouble-armed levers in a downward direction, whereas the springs 9 and 9acting on the double-armed levers in an upward direction are arranged onthe lower portion 12 of the support 30. According to the embodimentshown in the drawings, the upper portion 11 may be swung about the pivot13 from the operative position shown in Fig. l into the inoperative oropen position shown in Fig. 3. If desired, however, the upper portion 11may be detachably mounted on the lower portion 12. The series of notches10 and 10 are provided at the line of contact between the upper andlower portions 11 and 12, respectively. In the operating position theupper portion 11 is fastened to the lower portion 12 by means of aspring catch 14.

In order to change the distances between the top rollers the upperportion 11 is simply swung, in the direction of the arrow A of Fig. l,into the position shown in Fig. 3. Thereafter the double-armed levers 5,6 and 5', 6 may be displaced manually, as required. The upper portion 11is then again lowered and fastened to the lower portion 12.

The double-armed levers 5, 6 and 5', 6' must have a predeterminedlength. If it is desired to bring two top rollers close to each other,preferably, as shown in Fig. 3, the support 130 is divided into twocompartments 116 and 117 by means of a vertical longitudinal partition115. In such a case, the double-armed lever 105, 106, 107 carrying thedelivery top roller isarranged in the compart ment 116, whereas thecompartment 117 will house the double-armed lever 105', 106', 107carrying the center top roller. In this way the delivery top roller andthe center top roller may be brought together so close that they willtouch. each other. It is merely necessary that the series of notches 110and 110' are arranged accordingly and that the lower parts of the frontarms 105', 105 of the double-armed levers carrying the holders for thetwo top rollers are arranged in alignment with each other in a commonvertical plane.

Preferably, as shown in Fig. 4, the spring 9 of a support according toFig. l is arranged around a guiding pin 18 secured to the wall of thelower portion 12 of the support 30. A flattened head 19 of said pin 18is engaged with an elongated slot 20 of the arm 6 of the doublearmedlever 5, 6, 7. Itis understood, that the spring 9' may be mounted on thelower portion 12 of the support 30 in a similar manner. Likewise thesprings 8 and 8 may be mounted on the upper portion 11 of the support 30in a similar manner.

The entire support 30 may be tilted around a supporting rod 21, towithdraw the top rollers 1, 2 and 3 from the bottom rollers (not shown).Preferably locking means (not shown) are provided for holding theswingable support 30 in its two end positions.

I have described preferred embodiments of my invention, but it isunderstood that this disclosure is for the purpose of illustration, andthat various omissions and changes in shape, proportion and arrangementof parts, as well as the substitution of equivalent elements for thearrangements shown and described may be made without departing from thespirit and scope of the invention as set forth in the appended claims.

For example, the weighting means need not necessarily be compressionsprings. Tension springs will be also suitable for this purpose.Furthermore, leaf springs may be used instead of helical springs asshown. It is also possible to use weights.

The double-armed levers 5, 6 and 5', 6', furthermore, may be mountedjointly, or each one separately, on a slider which is lengthwiseadjustable on the support. If the support is in the shape of a hollowbody, the slider may be arranged within the interior thereof.

Furthermore the holders 4 and 4 for the top rollers 1 and 2 may bemounted on a single double-armed lever. In such a case it is merelynecessary to provide for a saddle pivotally mounted on the front arm 5of the doublearmed lever 5, 6, both ends of said saddle carrying theholders 4 and 4 for the top rollers 1 and 2.

What I claim is:

1. In a drawing frame for a spinning machine, the combination of:supporting means, at least one doublearmed lever swingably mounted onsaid supporting means, a top roller mounted on one arm of saiddouble-armed lever, the axis of said swingable mounting of thedoublearmed lever being adjustable relative to said supporting means ina direction substantially parallel to the longitudinal axis of saidsupporting means, a lirst weighting means operatively engaged withsaidlsupporting means and one arm of the double-armed lever, and asecond weighting means operatively engaged with said supporting meansand the other arm of the double-armed lever, said two weighting meansacting on said two arms of the double-armed lever in opposite directionsfor subjecting same to the same direction of rotation, the points ofengagement of said two weighting means with said supporting means beingstationary and the points of engage ment of said two weighting meanswith said double-armed lever being displaceable along the latter wherebyupon a displacement of said axis of said swingable mounting of thedouble-armed lever said axis is brought nearer to the point ofengagement of one of said Weighting means wtih said double-armed leverto the same extent as it is removed from the point of engagement of theother weighting means with said doublearmed lever so that a reduction ofthe pressure of one of the weighting means on said double-armed leverresults in a corresponding increase of the pressure of the otherweighting means on said double-armed lever.

2. In a drawing frame as claimed in claim l, said weighting meansincluding springs stationarily mounted on said supporting means andslidably engaged with said double-armed lever.

3. In a drawing frame as claimed in claim l, said weighting meansincluding helical springs slidably engaged with said double-armed lever,and a number of guiding pins equal to the number of springs, eachguiding pin being secured to said supporting means and extendingsubstantially perpendicular to the longitudinal axis of said supportingmeans, and each spring being wound around one of said guiding pins.

4. In a drawing frame as claimed in claim l, each arm of saiddouble-armed lever having a slot, said weighting means including helicalsprings slidably engaged with said double-armed lever, and a number ofguiding pins equal to the number of springs, each guiding pin beingsecured to said supporting means and slidably engaged with one of saidslots of the double-armed lever, and each spring being wound around oneof said guiding pins.

5. In a drawing frame as claimed in claim l, said supporting meansincluding a hollow body having an upper portion and a lower portionconnected with each other, said first weighting means being engaged withsaid upper portion and the upper surface of one arm of said doublearmedlever, and said second weighting means being engaged with said lowerportion and the lower surface of the other arm of said double-armedlever.

6. In a drawing frame as claimed in claim l, said supporting meansincluding a hollow body, said doublearmed lever being arranged withinsaid hollow body, said tirst weighting means including a first springengaged with the inner upper surface of said hollow body and the uppersurface of said one arm of the double-armed lever, and said secondweighting means including a second spring engaged with the inner lowersurface of said hollow body and the lower surface of said other arm ofthe doublearmed lever.

7. In a drawing frame as claimed in claim l, said supporting meansincluding an upper portion and a lower portion swingably connected witheach other.

8. In a drawing frame as claimed in claim l, said supporting meansincluding an upper portion and a lower portion connected with eachother, a shaft arranged on said double-armed lever, said supportingmeans having a series of notches at the engaging surfaces of said upperand lower portions, and said shaft of the double-armed lever beingdisplaceable relative to said notches for selective engagement with aselected pair of registering notches in said upper and lower portions.

9. In a drawing frame as claimed in claim l, said supporting meanshaving a longitudinally extending partition dividing the same` into twocompartments, two double armed levers swingably and adjustably mountedon said supporting means, a pair of weighting means and a top rollerassociated with each of said double-armed levers, one of saiddouble-armed levers being arranged in one of said two compartments, andthe other double-armed lever being arranged in the other compartment.

References Cited in the file of this patent UNITED STATES PATENTS2,662,249 Neu Deo. 15, 1953 6 Raible et al. Apr. 20, 1954 Dausch Nov.16, 1954 Noguera Sept. 13, 1955 FOREIGN PATENTS France Oct. 14, 1953France Feb. 17, 1954

